Here are some instructions:

- Enter a number and a unit in the two "Convert from:" fields.
- Use
`lbm`

for pound-mass, and`lb`

for pound force. They are not interchangeable. - Do not use
`F`

or`C`

in mixed units, use`R`

or`K`

instead. For example use`W/m K`

instead of`W/m C`

. - A mixed unit can have several units in the numerator and several in the denominator.
- You may use a caret for exponents (negative or positive).
- At the bottom of the applet, the unit is specified in terms of primitive units.
- If you change the system to "user specified" you may also change the "convert to" unit. A warning will be issued if the two units are not compatible.
- See the unit list for a list of built in units and prefixes, and a more detailed description.